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John Wall (inventor)
|Born||26 June 1932|
|Died||27 January 2018 (aged 85)|
|Template:Infobox engineering career|
John Wall (26 June 1932 – 27 January 2018) was an English design engineer, amateur astronomer, and amateur telescope maker. He was a member of the British Astronomical Association until his death in 2018. He was known for designing dialyte based refracting telescopes, coming up with the Zerochromat.
- A New Refractor Concept: "The Wall Hypochromatic Refractor"
- The John Wall 30-inch refractor.
- The Crayford eyepiece mounting by John Wall - Journal of the British Astronomical Association, 81 (2), 118, February 1971
- Crayford focusers
- Crayford Eyepiece Mount
- astronomics.com's description of how the Crayford Focuser works